CN209757571U - Microminiature fuse cutter for spaceflight - Google Patents
Microminiature fuse cutter for spaceflight Download PDFInfo
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- CN209757571U CN209757571U CN201822276646.9U CN201822276646U CN209757571U CN 209757571 U CN209757571 U CN 209757571U CN 201822276646 U CN201822276646 U CN 201822276646U CN 209757571 U CN209757571 U CN 209757571U
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- cutter
- resistance wire
- hot knife
- fuse
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Abstract
The utility model provides a microminiature fuse cutter for spaceflight, which comprises a base, an upper cover plate, a first hot knife holder, a second hot knife holder, a resistance wire, a clapboard, an elastic element and a wire pressing terminal; the resistance wire is used as a hot knife and is arranged around the hot knife holder, only the head of the hot knife holder leaves a space, the rest part is processed into a groove, and the resistance wire is filled into the groove; the resistance wire is connected with an external circuit through a wire pressing terminal; each hot knife uses different circuits to supply power, and the circuits are mutually backed up; in order to avoid mutual interference between the hot knives, a layer of partition plate is added between the hot knives; for the hot blade holder of drive, install elastic element between base and hot blade holder the utility model discloses a fuse cutterbar is small, light in weight can, lean on the nature high, do not have the impact, can be used to the solar cell battle array of microsatellite or skin receiving satellite compress tightly and release, also can be used to compressing tightly and releasing of mechanisms such as microsatellite antenna.
Description
Technical Field
The utility model relates to a controlled separator technical field of spacecraft especially relates to a microminiature fuse cutterbar for space flight.
Background
The cutter used on the spacecraft is an action element of a compaction release device, and is generally used in a solar wing and antenna compaction release device. The cutter functions to cut the screws, cords, cables, etc. used to lock these mechanisms for a release purpose. The reliability of the cutter is directly related to whether the solar wing or the antenna acts or not, so that the success or failure of the whole spacecraft is influenced, the cutter is generally determined as a key part of the whole satellite, and the cutter plays a very important role in the spacecraft. According to the different working principles of the cutter, common cutters include a fire cutter, a memory alloy cutter, a non-fire cutter and the like.
The disadvantages of the fire separation are mainly: (1) the weight is large, and the common fire cutter is more than 120 g; (2) the storage and the use need to comply with the regulation of the management of the initiating explosive devices, and need to be preserved and managed in a special place by a special person; (3) the volume is large; (4) the separation impact is very large, typically greater than 2000 g. Due to the problems, the fire cutter is mainly used for connecting and unlocking large-mass structures of large spacecrafts and is not suitable for small mechanisms.
the main drawbacks of memory alloy cutters are: (1) the weight is large, and the common fire cutter is more than 100 g; (2) the volume is slightly larger; (3) the separation impact is large, generally greater than 1000 g. Due to the above problems, the initiating explosive device can be widely used for link unlocking of a medium-sized space mechanism.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a microminiature fuse cutterbar for space flight, the utility model discloses a cutterbar simple structure, it is small, light in weight (20g), the reliability is high, and no impact, the direct 3V power supply of no circuit. The utility model discloses specifically realize through following technical scheme:
A microminiature fuse cutter for spaceflight comprises a base, an upper cover plate, a first hot cutter seat, a second hot cutter seat, a resistance wire, a partition plate, an elastic element and a wire pressing terminal; the resistance wire is used as a hot knife and is arranged around the hot knife holder, only the head of the hot knife holder leaves a space, the rest part is processed into a groove, and the resistance wire is filled into the groove; the resistance wire is connected with an external circuit through a wire pressing terminal; each hot knife uses different circuits to supply power, and the circuits are mutually backed up; in order to avoid mutual interference between the hot knives, a layer of partition plate is added between the hot knives; in order to drive the hot knife holder, an elastic element is arranged between the base and the hot knife holder.
As a further improvement of the utility model, the resistance wire is controlled by an external circuit, or a control circuit is added in the cutter.
As a further improvement of the utility model, the number of the hot knives is two or more than two layers.
As a further improvement of the utility model, the material of the clapboard is Teflon.
As a further improvement of the present invention, the elastic element is a compression spring.
As a further improvement of the utility model, there is the erection column on the base, and there is the mounting hole corresponding position on the upper cover plate, and the erection column cooperation on the base, adopts the screw to connect.
As a further improvement of the utility model, the cutting object of the cutter is high-strength polyethylene fiber.
As a further improvement of the utility model, the diameter value of the high-strength polyethylene fiber is 1mm, and the pulling force on the rope is 200N.
As a further improvement of the utility model, the resistance wire is about 49mm long, and the resistance value is about 0.8 omega.
As a further improvement of the utility model, the base uses aluminum alloy 2A12, and hot blade holder and upper cover plate use glass steel, the model OD.LZ1-6 of line ball terminal
The utility model has the advantages that: the utility model discloses a fuse cutter is small, light in weight can, the nature of relying on is high, do not have the impact, can be used to the solar cell array of microsatellite or skin nano satellite compress tightly and release, also can be used to compressing tightly and releasing of mechanisms such as microsatellite antenna.
Drawings
FIG. 1 is an exploded view of the fuse cutter of the present invention;
FIG. 2 is a three-dimensional block diagram of the fuse cutter of the present invention;
FIG. 3 is a schematic view of the extended state of the fuse cutter of the present invention;
Fig. 4 is a schematic view of the fuse cutter of the present invention in a retracted state.
Detailed Description
The present invention will be further described with reference to the following description and embodiments.
The principle of the fuse cutter is that a heating device (also called a hot knife) is used for heating to a certain temperature, and then a rope or other fibers are fused. The utility model discloses mainly used aerospace's mechanism unblock, cutting object are high strength polyethylene fibre.
As shown in figures 1-2, the micro fuse cutter for spaceflight of the utility model comprises a base (1), an upper cover plate (2), an upper layer hot knife holder (3), a lower layer hot knife holder (4), a resistance wire (5), a clapboard (6), an elastic element (7) and a wire pressing terminal (8).
Resistance wire (5) are installed around hot blade holder as the hot sword, and the space is left at the hot blade holder only head, and other parts process into the recess, fill the resistance wire into the recess, and except the head in the heating process like this, the heat of all the other resistance wires is led away by hot blade holder, has avoided the resistance wire overlength to lead to the problem of resistance wire high temperature. The resistance wire (5) is connected with an external circuit through a wire pressing terminal (8) and is controlled by the external circuit. Or control circuitry may be added to the slicer.
The cutter comprises two hot knives which are powered by different circuits and are mutually backed up. Of course, the number of the hot blades is not limited to two, and may be one layer, three layers, or more than three layers.
Structurally, the upper layer and the lower layer of hot knives are mutually independent, a layer of partition plate (6) is added for avoiding mutual interference between the upper layer and the lower layer of hot knives, and Teflon is used as a material.
In order to drive the hot knife seat, an elastic element (7) (such as a compression spring) can be added between the base (1) of the cutter and the hot knife seat, the force of the elastic element (7) has certain influence on cutting, and tests show that the pushing force is about 150N under the condition that the compression spring selects the maximum compression stroke, so that the action of the hot knife can be reliably ensured.
The base (1) is provided with a mounting column for fixing the upper cover plate (2). The corresponding position on the upper cover plate (2) is provided with a mounting hole which is matched with a mounting column on the base (1) and is connected by screws (9 and 10).
The utility model discloses the object of cutting is high strength polyethylene fiber (or called ultra high molecular weight polyethylene fiber), and this kind of rope has intensity height, and the characteristic that the melting point is low is fit for being regarded as by the cutting rope, and high strength polyethylene fiber's diameter recommended value is 1mm, and the pulling force recommended value on the rope is 200N. The fiber has very high strength and relatively small elongation and creep, and compared with Kevlar ropes commonly used in aerospace, the cutting temperature of the ropes is lower, so that the fiber is an ideal cut fiber. The fuse wire cutter is stuck to the outer side of the structure of the spacecraft when in work.
The main body of each cutter is an upper and a lower double-layer resistance wire (hot knife) and a matched hot knife holder thereof, a Teflon clapboard is padded between the two hot knives for isolating relative movement and providing certain lubrication, and the resistance wire of each hot knife is about 49mm (the resistance value is about 0.8 omega). The length of the resistance wire can be reduced or increased or the diameter of the resistance wire can be modified according to different cutting objects.
The utility model discloses the selection of material is also very important, and wherein aluminum alloy 2A12 is used in base (1), and glass steel is used in hot blade holder and upper cover plate (2), the model OD.LZ1-6 of line ball terminal (8).
The utility model discloses a fuse cutterbar parameter does:
a) Normal temperature vacuum cutting time: less than or equal to 20s
b) Cutting current: 2.0 to 2.2A
c) The whole weight is as follows: less than or equal to 50g
d) The number of times of repeated cutting: more than 20 times
e) Single unlocking reliability: > 0.9996
f) Working temperature: -50 ℃ to 80 DEG C
g) The ground storage life is more than or equal to 2 years
h) Adopts non-magnetic material and meets the requirement of space environment.
The rope strains a load, passes the resistance wire, and the extension state that becomes figure 3 is drawn out to the resistance wire with hot blade holder, spring compression state this moment, and the resistance wire temperature rose after the heating, and the fusing rope is loosened by the taut object of rope, and the load that is compressed tightly is released, and hot blade holder and resistance wire are got back to like the shrink state shown in figure 4 under compression spring's drive simultaneously.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.
For those skilled in the art, without departing from the spirit of the present invention, several simple deductions or substitutions may be made, which should be considered as belonging to the protection scope of the present invention.
Claims (10)
1. A microminiature fuse cutter for spaceflight is characterized in that: the cutter comprises a base, an upper cover plate, a first hot cutter seat, a second hot cutter seat, a resistance wire, a partition plate, an elastic element and a wire pressing terminal; the resistance wire is used as a hot knife and is arranged around the hot knife holder, only the head of the hot knife holder leaves a space, the rest part is processed into a groove, and the resistance wire is filled into the groove; the resistance wire is connected with an external circuit through a wire pressing terminal; each hot knife uses different circuits to supply power, and the circuits are mutually backed up; in order to avoid mutual interference between the hot knives, a layer of partition plate is added between the hot knives; in order to drive the hot knife holder, an elastic element is arranged between the base and the hot knife holder.
2. the fuse cutter of claim 1, wherein: the resistance wire is controlled by an external circuit.
3. The fuse cutter of claim 1, wherein: the number of the hot knives is two or more than two.
4. The fuse cutter of claim 1, wherein: the material of the baffle is Teflon.
5. The fuse cutter of claim 1, wherein: the elastic element is a compression spring.
6. The fuse cutter of claim 1, wherein: the base is provided with a mounting column, a mounting hole is formed in the corresponding position of the upper cover plate, the mounting hole is matched with the mounting column on the base, and the mounting column is connected through a screw.
7. The fuse cutter of claim 1, wherein: the cutting object of the cutter is high-strength polyethylene fiber.
8. The fuse cutter of claim 7, wherein: the diameter value of the high-strength polyethylene fiber is 1mm, and the tensile force on the rope is 200N.
9. the fuse cutter of claim 8, wherein: the resistance wire is about 49mm long and has a resistance value of about 0.8 omega.
10. The fuse cutter of claim 1, wherein: the base is made of aluminum alloy 2A12, the hot knife holder and the upper cover plate are made of glass fiber reinforced plastics, and the model of the wire pressing terminal is OD.LZ 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822276646.9U CN209757571U (en) | 2018-12-29 | 2018-12-29 | Microminiature fuse cutter for spaceflight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822276646.9U CN209757571U (en) | 2018-12-29 | 2018-12-29 | Microminiature fuse cutter for spaceflight |
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| Publication Number | Publication Date |
|---|---|
| CN209757571U true CN209757571U (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822276646.9U Active CN209757571U (en) | 2018-12-29 | 2018-12-29 | Microminiature fuse cutter for spaceflight |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109515761A (en) * | 2018-12-29 | 2019-03-26 | 深圳航天东方红海特卫星有限公司 | A kind of space flight microminiature fuse cutter |
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2018
- 2018-12-29 CN CN201822276646.9U patent/CN209757571U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109515761A (en) * | 2018-12-29 | 2019-03-26 | 深圳航天东方红海特卫星有限公司 | A kind of space flight microminiature fuse cutter |
| CN109515761B (en) * | 2018-12-29 | 2024-04-02 | 深圳航天东方红海特卫星有限公司 | Microminiature fuse cutter for spaceflight |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 whole building of satellite building, 61 Gaoxin South Jiudao, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Aerospace Dongfanghong Satellite Co.,Ltd. Address before: 518000 whole building of satellite building, 61 Gaoxin South Jiudao, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province Patentee before: AEROSPACE DONGFANGHONG DEVELOPMENT Ltd. |